Glass-pressing apparatus.



No. 783,046. PATENTED FEB. 21, 1905. J. 0. JOHNSON.

GLASS PRESSING APPARATUS APPLICATION FILED NOV. so. 1903.

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O 1 wnuzss: II'IITOR N 78 PATENTED FEB. 21, 1905. J. 0. JOHNSON.

GLASS PRESSING APPARATUS.

APPLICATION FILED NOV. so. 1903.

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wrmss'ses IIIVIITOR ww l u T I I Y I I PATENTED FEB. 21-, 1905. J. 0. JOHNSON. GLASS PRESSING APPARATUS, APPLICATION FILED NOV 30. 1903 s SHBETB-BHEET a.

WITNESS E w mmw UNITED STATES Patented February 21, 1905. I

PATENT OFFICE.

JESSE O. JOHNSON, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR OF ONE- HALF TO DOS TAYLOR, OF PITTSBURG, PENNSYLVANIA.

GLASS-PRESSING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 783,046, dated February 21, 1905.

Application filed November 30, 1903. $erial No. 183,101.

To all whom it may concern:

Be it known that I, J EssE O. JOHNSON, of Pittsburg, Allegheny county, ,Iennsylvania, have invented a new and useful Glass-Pressing Apparatus, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l is a sectional side elevation showing apparatus constructedin accordance with my invention. Fig. 2 is a sectional elevation with the parts in normal position. Fig. 3 is a partial side elevation showing the lever mechanism, and Fig. 4 is a sectional plan view.

My invention relates to the pressing of groups of small glass articles, such as tiles, bottle-stoppers, vault-lights, &c.; and the object of the invention is to provide a simple and effective machine by which such articles may be rapidly and economically formed.

In the drawings, 2 represents a rotary table supported upon a ball-bearing 3 upon a circular bed-plate 4. The bed-plate is carried upon suitable framing 5, which I have shown as supported upon wheels 6, making the device portable. The table is adapted to be turned by hand and is provided with three stations A, B, and C. Of this, A is the pressing-station, B a shearing-station, and O the ejectingstation. At the remainingstations the grids are allowed to cool sufficiently to prevent stickingbefore the next operation. The table is provided with five circular holes, in each of which sets a circular perforated grid or plate 7.

At the pressing-station the bed-plate 4 is provided with a circular hole arranged to register with the holes in the rotary table, and beneath this hole is a pneumatic cylinder 8, containing a piston 9. The piston-rod 10 extends through a suitable packing-gland in the upper head of the cylinder and is provided at its upper end with a plate 11, arranged to enter a circular recess in the mold 12.

The mold consists of a circular metal block having a series of molding-cavities which are arranged to register with the perforations in the grid-plates 7.

I have shown the cylinder 8 as controlled Above the table and in line with the pneumatic cylinder is located a stationary plunger 21, removably secured to a stem 22, carried upon a bracket 23, projecting from the hollow central standard 24:. The lower spring-plate 25 is carried upon the spring-pressed pins 26, 5 carried on the upper spring-plate 27. In pressing the glass the requisite amount of glass is dropped into the mold-ring and lies upon the grid. The operator then admits fluid beneath the piston of the pneumatic cylinder 7 8, and as the piston rises it carries the mold, the grid, and the mold-ring upwardly into the position shown in Fig. l. The glass is thus pressed downwardly through the perforations in the grid and into the molding-cavities and at the same time fiows around the plunger and leaves a thin ring connecting with a thin film of glass over the grid. The operator then shifts the valve and lowers the mold parts, and during the lowering movement the mold-ring 30 is engaged by oppositely-placed fingers 28, sliding in brackets 29, projecting from a ring 30, adjustably secured to the hollow upright 24:. These fingers are normally pressed outwardly by springs 31 and are beveled on their 5 lower faces, so that during the upward movement the handles 20 of the mold-ring will engage and force them back. When lowering, however, these handles strike upon the upper fiat faces of the fingers which support the 9 mold-ring and strip it as the grid and mold move down. As the mold nears the lower part of its movement the grid is engaged by the shoulder surrounding the circular hole in the table, and as the mold moves down it leaves the glass articles with their stems within the holes in the grid. At the end of this operation, therefore, the grid lies in the table with the molded glass articles hanging in it. The Operator now depresses a foot-lever 32, which connects through rod 33 with the spring-latch 34, engaging recesses in the table. The table is thus unlocked, and the operator then turns it until the grid, with the pressed articles therein, reaches the station (1. During this movement the film and thin ring of glass over the grid are sheared ofl by a horizontally-extending shear-blade 35, projecting laterally from the hollow standard 24. This shear-blade is arranged to engage the upper surface of the grid and strip the glass therefrom during the turning of the table. The glass thus sheared off drops off into a pan 36. (Shown in Fig. 4.) The bed-plate 4 is provided with an elongated opening which extends beneath the stations Band C, as shown in dotted lines in Fig. 4, so that if any of the articles drop down from the grid during the shearing they will fall through this hole into a suitable receptacle. When the grid reaches the station C, the operator releases the foot-lever and the table is then looked. The articles are then stripped from the gridplate at station C by means of an ejector 37, having depending pins which register with the holes in the grid. This ejector is secured to the lower end of a piston-rod 38, secured to piston 39, moving in a pneumatic cylinder 40, carried upon a bracket 41, secured to the standard 24. The supply and exhaust pipes 42 and 43 extend upwardly and then down through the hollow standard 24 and lead to avalve-chest 44. This valve-chest and valve are arranged similarly to the one previously described, except that the valve-stem is provided with a spring 45, which keeps the valve normally in a raised position. In this raised position of the valve the ejector is forced down to the' lower end by its stroke. The lowerend of this valve-stem is connected by rod 46 with the foot-lever 32, so that whenever the operator depresses the lever the ejector-plate will be lifted. As soon, therefore, as the grid. with the articles in has reached the station C and the operator releases the foot-lever to lock the table the spring 45 shifts the valve and causes the ejector to be forced down. In this downward movement the ejector-pins enter the holes in the grid, and the articles are thus forced down and drop into the receptacle.

It will be noted that the ejecting operation is automatic, so that whenever the grid reaches station C the articles will be ejected by the act of locking the table. As soon as the table is thus locked the operator takes the mold-ring 19 from the fingers and places it upon the next grid and repeats the operation.

The advantages of my invention result from the rapidity of operation and the automatic nature of the apparatus. The attendant has only to shift the valve for the one cylinder and to turn the table, the machine carrying out the necessary steps. The articles may thus be produced rapidly and at small cost.

was e Many variations may be made in the form and arrangement of the mold, the grid-plates, &c., without departing from myinvention.

I claim 1. In glass-pressing apparatus, a mold having a plurality of mold-cavities, a separate grid-plate having a series of perforations arranged to register with the mold cavities, molding apparatus in connection therewith, means for carrying the grid-plate and articles sidewise and a shear arranged to cut ofi the surplus glass during said lateral movement; substantially as described.

2. In glass-pressing apparatus, a mold having a plurality of mold-cavities, a separate grid-plate having a series of perforations arranged to register with the mold-cavities, a vertically-movable ejector and mechanism for moving the ejector to force the articles from the plate; substantially as described.

3. In glass-pressing apparatus a rotary table having a mold with a plurality of mold-cavities, separate grid-plates having a series of perforations arranged to register with the moldcavities, pressing mechanism at one station and an ejector at another station arranged to force the articles from the grid-plate, substantially as described.

4. In glass-pressing apparatus a rotary table having a mold with a plurality of mold-cavities, separate grid-plates having aseries of perforations arranged to register with the moldcavities, pressing apparatus at one station, ejector mechanism at another station and connections arranged to operate the ejector mechanism when the table is locked; substantially as described.

5. In glass-pressing apparatus, a mold having a plurality of mold-cavities, a rotary table carrying grid-plates having perforations arranged to register with the mold-cavities and a shear arranged to move the surplus glass during the turning of the table; substantially as described.

6. In glass-pressing apparatus, a mold having a plurality of mold-cavities, a rotary table carrying grid-plates having perforations arranged to register with the mold-cavities, a pressing apparatus at one station, an ejector at another station, and a shear between said stations and arranged to remove the surplus glass from the grid during the turning of the table; substantially as described.

7. In glass-pressing apparatus, a rotary table, a locking device therefor, an ejector, and actuating connections between the ejector and locking device arranged to automatically move IIO the ejector into operative position as the lockdevice for the table; an ejector, and connections arranged to operate the ejector when the table is locked; substantially as described.

9. In glass-pressing apparatus a rotary table having an ejector at one station, a cylinder arranged to operate the ejector, a valve controlling the fluid-supply to the cylinder having its movable element, a lever connected to the valve and a locking device for the table also connected to said lever; substantially as described.

10. In glass-pressing apparatus, a mold having a plurality of mold-cavities, a rotary table having a plurality of holes therein, grid-plates resting in said holes and having perforations arranged to register With the mold-cavities and mechanism for dropping the articles from the grids While resting on the table; substantially as described.

11. In glass-pressing apparatus, a mold having a plurality of mold-cavities, a rotary table carrying a series of grid-plates provided With perforations and ejector mechanism forming a part of the apparatus and arranged to eject the articles from the grid-plates; substantially as described.

12. In glass-pressing apparatus, a mold having a plurality of mold-cavities, a rotary table, a series of grid-plates provided With perforations supported thereon and pressing apparatus at one station arranged to press articles With portions thereof in the grid-plate; substantially as described.

13. In glass-pressing apparatus, amold having a plurality of mold-cavities, a rotary table having grid plates provided with perforations, and pressing apparatus at one station arranged to lift the grid-plates and press the articles, said grid-plates being arranged to rest upon the table during the remainder of the revolution; substantially as described.

In testimony whereof I have hereunto set my hand.

JESSE o. JOHNSON.

Witnesses:

GEO. B. BLEMING, J 011v MILLER. 

